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1.1 root 1: /*
2: * QEMU Audio subsystem header
3: *
4: * Copyright (c) 2003-2004 Vassili Karpov (malc)
5: *
6: * Permission is hereby granted, free of charge, to any person obtaining a copy
7: * of this software and associated documentation files (the "Software"), to deal
8: * in the Software without restriction, including without limitation the rights
9: * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10: * copies of the Software, and to permit persons to whom the Software is
11: * furnished to do so, subject to the following conditions:
12: *
13: * The above copyright notice and this permission notice shall be included in
14: * all copies or substantial portions of the Software.
15: *
16: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17: * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19: * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20: * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21: * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22: * THE SOFTWARE.
23: */
24: #ifndef QEMU_AUDIO_INT_H
25: #define QEMU_AUDIO_INT_H
26:
27: #include "vl.h"
28:
29: struct pcm_ops;
30:
31: typedef struct HWVoice {
32: int active;
33: int enabled;
34: int pending_disable;
35: int valid;
36: int freq;
37:
38: f_sample *clip;
39: audfmt_e fmt;
40: int nchannels;
41:
42: int align;
43: int shift;
44:
45: int rpos;
46: int bufsize;
47:
48: int bytes_per_second;
49: st_sample_t *mix_buf;
50:
51: int samples;
52: int64_t old_ticks;
53: int nb_voices;
54: struct SWVoice **pvoice;
55: struct pcm_ops *pcm_ops;
56: } HWVoice;
57:
58: extern struct pcm_ops no_pcm_ops;
59: extern struct audio_output_driver no_output_driver;
60:
61: extern struct pcm_ops oss_pcm_ops;
62: extern struct audio_output_driver oss_output_driver;
63:
64: extern struct pcm_ops sdl_pcm_ops;
65: extern struct audio_output_driver sdl_output_driver;
66:
67: extern struct pcm_ops wav_pcm_ops;
68: extern struct audio_output_driver wav_output_driver;
69:
70: extern struct pcm_ops fmod_pcm_ops;
71: extern struct audio_output_driver fmod_output_driver;
72:
73: struct audio_output_driver {
74: const char *name;
75: void *(*init) (void);
76: void (*fini) (void *);
77: struct pcm_ops *pcm_ops;
78: int can_be_default;
79: int max_voices;
80: int voice_size;
81: };
82:
83: typedef struct AudioState {
84: int fixed_format;
85: int fixed_freq;
86: int fixed_channels;
87: int fixed_fmt;
88: int nb_hw_voices;
89: int64_t ticks_threshold;
90: int freq_threshold;
91: void *opaque;
92: struct audio_output_driver *drv;
93: } AudioState;
94: extern AudioState audio_state;
95:
96: struct SWVoice {
97: int freq;
98: audfmt_e fmt;
99: int nchannels;
100:
101: int shift;
102: int align;
103:
104: t_sample *conv;
105:
106: int left;
107: int pos;
108: int bytes_per_second;
109: int64_t ratio;
110: st_sample_t *buf;
111: void *rate;
112:
113: int wpos;
114: int live;
115: int active;
116: int64_t old_ticks;
117: HWVoice *hw;
118: char *name;
119: };
120:
121: struct pcm_ops {
122: int (*init) (HWVoice *hw, int freq, int nchannels, audfmt_e fmt);
123: void (*fini) (HWVoice *hw);
124: void (*run) (HWVoice *hw);
125: int (*write) (SWVoice *sw, void *buf, int size);
126: int (*ctl) (HWVoice *hw, int cmd, ...);
127: };
128:
129: void pcm_sw_free_resources (SWVoice *sw);
130: int pcm_sw_alloc_resources (SWVoice *sw);
131: void pcm_sw_fini (SWVoice *sw);
132: int pcm_sw_init (SWVoice *sw, HWVoice *hw, int freq,
133: int nchannels, audfmt_e fmt);
134:
135: void pcm_hw_clear (HWVoice *hw, void *buf, int len);
136: HWVoice * pcm_hw_find_any (HWVoice *hw);
137: HWVoice * pcm_hw_find_any_active (HWVoice *hw);
138: HWVoice * pcm_hw_find_any_passive (HWVoice *hw);
139: HWVoice * pcm_hw_find_specific (HWVoice *hw, int freq,
140: int nchannels, audfmt_e fmt);
141: HWVoice * pcm_hw_add (int freq, int nchannels, audfmt_e fmt);
142: int pcm_hw_add_sw (HWVoice *hw, SWVoice *sw);
143: int pcm_hw_del_sw (HWVoice *hw, SWVoice *sw);
144: SWVoice * pcm_create_voice_pair (int freq, int nchannels, audfmt_e fmt);
145:
146: void pcm_hw_free_resources (HWVoice *hw);
147: int pcm_hw_alloc_resources (HWVoice *hw);
148: void pcm_hw_fini (HWVoice *hw);
149: void pcm_hw_gc (HWVoice *hw);
150: int pcm_hw_get_live (HWVoice *hw);
151: int pcm_hw_get_live2 (HWVoice *hw, int *nb_active);
152: void pcm_hw_dec_live (HWVoice *hw, int decr);
153: int pcm_hw_write (SWVoice *sw, void *buf, int len);
154:
155: int audio_get_conf_int (const char *key, int defval);
156: const char *audio_get_conf_str (const char *key, const char *defval);
157:
158: struct audio_output_driver;
159:
160: #define VOICE_ENABLE 1
161: #define VOICE_DISABLE 2
162:
163: #endif /* audio_int.h */
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